Column base



FIG. 1 is a front perspective view of a column base showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a side elevational view thereof, the other side being a mirror image; and,

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a column base, as shown and described. 